Since investors are forward-looking, I don't think there are many situations where a change that's good for the long-term value of the company will necessarily drive down the share price in the short term.
You might drive down the share price if earnings go down, but that's not necessarily the case if the long-term value is clear. An example would be any company reinvesting earnings in a new factory.
You might drive down the share price if earnings go down, but that's not necessarily the case if the long-term value is clear. An example would be any company reinvesting earnings in a new factory.